how to set using "noreply" flag?

[wangzhilong]

I wan't to set with noreply flag, but no api support.

[raffy4284]

+1 here...
we can probably pull up a PR to add that optional flag on this line?
https://github.com/bradfitz/gomemcache/blob/master/memcache/memcache.go#L587
( we'd probably block it on those that support the noreply flag )

[raffy4284]

So I have something like this...trying to add testing now though:
https://github.com/bradfitz/gomemcache/pull/153/files

Currently adding unit testing as well atm for this before I mark for review...
only thing is that this changes the interface on the Delete and DeleteAll commands